Hi Brian,
The arm looks like a German Drilling, as there appears to be a third barrel under the two side by side barrels. I don't recall ever seeing a pellet tin with just a picture and no narrative to indicate the origin of the pellets - it makes little sense other than from an aesthetic perspective as a maker usually likes to advertise their wares. I would agree with you over a previous owner wanting to make up something 'pretty' in this case.
A nice image all the same.
John